Xiao Ning, a girl separated from her parents, had to return to her hometown for school due to household registration issues. She accidentally discovered a secret hidden in the high mountains. After experiencing that unknown, dreamlike night, she seemed to have made new friends and truly integrated and understood this big family and its unique cultural heritage. The pain of separation no longer troubled her, and the hustle and bustle of the city gradually faded away from her. She continued to grow freely and happily in the high mountains.